There are several synonyms for the term "Order Spatangoida." These include the "sea urchin order" and "heart urchin order." The Order Spatangoida is a taxonomic classification that refers to a group of echinoderms characterized by a heart-shaped body and flattened underside. These marine creatures are found in shallow to deeper waters across the world's oceans. They play a vital role in the marine ecosystem and are an important food source for various organisms. Understanding the various synonyms associated with the Order Spatangoida can help scientists and researchers communicate about these creatures more effectively.